Timing Lights to flash on/off with music?
I suggest to keep talking about his problem.
Sounds added by user aren't recognized in the game automatically (since Portal 2's Source Engine).
You either need to rebuild your sound cache or (which is the better I mean) put that sound file into your map via Packrat.
How to do so -> search it in the forums. It's explained. Or use google.
My point about copyrighted songs in my maps is that they would have to be EXTENSIVELY searching through millions if portal 2 maps to find my maps which is unlikely. Copyright infringement prevention sites only monitor streaming websites like youtube close enough to give a damn, but a small map series on a lesser known (except to portal modding fans) website like Thinking With Portals, yeah, no real threat there...
Also I have tried DaMaGeppy's method to the letter, and I also used packrat after doing so, and I STILL can't get the sounds to play when I load the map. The sound files are all in the folder directories and whatnot and everything's straight, so what am I missing? If I keep failing at this I may have to have someone help me do so manually...
Did you read what I posted in that thread yesterday? 
Check out and if you STILL can't achieve it, just post your map and the audio file here.
Even though you can't hear your song in hammer, it doesn't mean that you can't hear it in the game 
As Skotty said it's needed to update the sound cache though, try in the console:
snd_updateaudiocache
OR
snd_rebuildaudiocache
But if you packed the audio file correctly into the .BSP, none of these commands are necessary, the game will play your music.
And btw, are you aware that you are talking of the same issue in 3 differnet threads (including Damagepy's)? >.<
useful tools and stuff here on TWP 
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Actually, if he were to perform it himself, it would be allowed as a tribute to the original. Look at youtube. People do tributes to songs all the time and those videos are not taken down. Distribution is only relevant if you use the original recording.
Also, as long as the song is not the primary thing being given out, it is NOT an issue to include it. Again, look at youtube.
There is also the fact that the song is 30 years old. I very much doubt BMI is going to bother to enforce copyright on a song that old.
Did you read what I posted in that thread yesterday? Check out and if you STILL can't achieve it, just post your map and the audio file here.
Even though you can't hear your song in hammer, it doesn't mean that you can't hear it in the game As Skotty said it's needed to update the sound cache though, try in the console:
snd_updateaudiocache
OR
snd_rebuildaudiocache
But if you packed the audio file correctly into the .BSP, none of these commands are necessary, the game will play your music.
And btw, are you aware that you are talking of the same issue in 3 differnet threads (including Damagepy's)? >.<
I can get it to play in hammer though.....
I'll try those however (and yes, discusing the problem in multiple topic means a larger likely hood of an answer! 
)
@ Protobug: All the songs I intend to use are almost thirty years old. (What is Love, Eye Of The Tiger, spoon full of sugar, the slide song from mario 64 etc, basically songs that will psychologically scar the player. At least while trying to solve portal maps, if you have any songs like this please suggest some! >=3 ) And there are people on youtube who upload the song IN FULL, without getting copyright, just because the video is the name of the song..
Youtube copyright laws are stupid that way <_<
Okay, I've done everything to the letter.....and....now instead of going to the custom map it loads where I was in the main game....
"What is Love"? Really?
"Eye of the Tiger"? Wow.
"Spoon Full of Sugar"? From "Mary Poppins"?
What music from Mario is going to scar people?
The only way those songs could psychologically scar you is if they are sudden and jarring in their presentation.
A few songs come to mind; "Maxwell's Silver Hammer" by the Beatles and "Artificial Flowers" by Bobby Darin. "Mack the Knife", also by Bobby Darin, is another one. "Beyond the Sea" (again Bobby Darin) might fit in with your "theme" better as it is fairly innocuous by itself.
Youtube copyright laws are stupid that way <_<
Exactly my point. Plus, when was the last time you heard of anyone being sued over distribution copyright stuff? The record labels have better things to do than search out every single bloody case of copyright infringement, especially for something 30 years old. I say don't even worry about copyright crap for the songs you want to use.
My university got sued when someone had copyrighted music in the background of their web page. It ended up costing the school a huge amount of money, and I think the student in question was suspended. Since then I've always been very careful about this.
If nothing else you should at least give credit somewhere in the map (try a game_text), and preferably trim the file down at least a little bit in length.
"What is Love"? Really?
"Eye of the Tiger"? Wow.
"Spoon Full of Sugar"? From "Mary Poppins"?
What music from Mario is going to scar people?
The only way those songs could psychologically scar you is if they are sudden and jarring in their presentation.
A few songs come to mind; "Maxwell's Silver Hammer" by the Beatles and "Artificial Flowers" by Bobby Darin. "Mack the Knife", also by Bobby Darin, is another one. "Beyond the Sea" (again Bobby Darin) might fit in with your "theme" better as it is fairly innocuous by itself.
Youtube copyright laws are stupid that way <_<
Exactly my point. Plus, when was the last time you heard of anyone being sued over distribution copyright stuff? The record labels have better things to do than search out every single bloody case of copyright infringement, especially for something 30 years old. I say don't even worry about copyright crap for the songs you want to use.
You kind of misunderstood my statement about "Scarring" them.
The custom voice clip mentions scarring the test subject, but really the songs are meant a distraction. Something that makes it difficult to solve the already complex tests. For example, try playing something like the Nyan Cat song while trying to play some of the harder portal 2 custom maps, tough and frustrating.
For eye of the tiger, Glados hacks the speakers of one hallway just before the boss fight to motivate the player for the battle and get them pumped for taking down the lameness core (Yes a lameness core...they have an 'adventure' core and a 'space' core so I don't see why not...)
What Is Love: Something you wouldn't expect to hear in aperature. Since it's test subjects get anything but love from management. It's the first chamber, so it's not that distracting, just annoying.
Spoon Full Of Sugar: The song itself is harmless, trying to do puzzle solving in death trap chambers of death is meant more for irony. As the joyful song is the only 'sugar' you get during this test. It's the second test chamber, and it fits with the whole 'sarcasm meant to annoy Chell' theme of the game.
Also, considering the slide song( http://www.youtube.com/watch?v=M-otEdq-Ozo) only played in the slides, during the red cap unlocking stage, and in rainbow road and tick tock clock levels...which are by far the most frustrating, it seemed fitting.
I don't want to "Scar" a player, I want to annoy them to the very brink of ragequitrawer. And to me some of these songs do that. For example....Never Gonna Give You Up, on a constant loop....
Also, certain parts of the tests will be "Timed" to the music to make things even more challenging. Every test chamber starts out pitch black with no lights on, the second the player steps in the lights start and the music does too. The hallways inbetween each chamber will be soundless.
For never gonna give you up, you're promised an escape route in this chamber, instead a companion cube and another very difficult test is presented xD so in a sense, you get rick rolled which can be frustrating if presented right...
Have you ever played around with this entity? The output I'm most interested in is: Soundlevel.
https://developer.valvesoftware.com/wik ... ve_trigger
Hammer time!
EDIT: so it cannot detect the soundlevel of an ambient generic... disappointing.